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arXiv · 0908.2736

Relaxation of superflow in a network: an application to the dislocation model of supersolidity of helium crystals

D. V. Fil·S. I. Shevchenko
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Abstract

We have considered the dislocation network model for the supersolid state in He-4 crystals. In difference with uniform 2D and 3D systems, the temperature of superfluid transition T_c in the network is much smaller than the degeneracy temperature T_d. It is shown that a crossover into a quasi superfluid state occurs in the temperature interval between T_c and T_d. Below the crossover temperature the time of decay of the flow increases exponentially under decrease of the temperature. The crossover has a continuous character and the crossover temperature does not depend on the density of dislocations.

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D. V. Fil, S. I. Shevchenko. 2009-08-19. Relaxation of superflow in a network: an application to the dislocation model of supersolidity of helium crystals. https://doi.org/10.1103/physrevb.80.100501

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